Auxiliary power for pumping.



' W. T. PIERCE.

AUXILIAR'Y POWER FOR PUMPING.

APPLICATION FILED ABR. 25, 1912,

1,036,328, Patented Aug. 20, l1912.

ulllp 'BEER/CE, OF CAMBRIDGE, MASSACHUSETTS. Y

AUXILARY POWER FOR PUMPING.

L'lti. Speciicaton of Letters` Patent.

Application tiled April 25, 1912. Serial No. 693,051.

dicated at le, and a storage tank is indicated at 15. The cylinder o't' a steam engine is indicated at 16, and the steam cated at 17, the piston being affixed to the -piston rod 13. The valve mechanism for admitting steam to the'cylnder 16 is indi'- cated as a whole at 1S. The steam-supply pipe' is indicated at 19, and the throttle valve therefor is indicated at 2041".'"An automatic regulator for the steam engine is indicated at 21.] There are, many styles of regulators for this purpose, and their function and operation are so well known that it is notnecessary to illustrate thel interior or to other than to state that when the pump has generated suicient pressure in the storage tank the regulator 2l shuts thejthrottle valve 20, and that when the pressure in the tank falls the regulator automatically opens the throttle valve to start the steam engine whereby the pump is operated to restore the Toa/,ZZ whom t may concern:

Be it knownthat l, WILLIAM T. Pinnen, a citizen ot the United States, and resident ot Cambridge, in the county ot Middlesex and State et Massachusetts, have. invented certain new and useful improvements' in Auxiliary Pcwer'tor Pumping, ot which the following is a specification.

The object or' the present invention is to )rovine auxiliary power for a steam-driven Plllll).

The invention is carried out by combining l an electric motor 'and transmitting mechanism with a pump and steam engine tor the The present 'invention does not reside in any degree in the pump or the steam engine but resides in the combination with Ithe pump ot two motors whichemploy different ower agents, such as steam and electricity, and a single regulator whereby both power agents are controlled. The auxiliary motor and controlling means therefor may be compressure in the storage `tank.

bined with any suit-able pump and steam lator Villustrated is ot the diaphragm type engine in suoli manner as to render the coml and is connected to the storage tank by a. .bined apparatus capable ot operating by pipe 22. When the pressure in the tank is of the desired degree, the plunger regulator isl raised. This plunger is con nected to a weighted arm 24 whose 'tulcrum 'is indicated at 25. i

at 26 and is so disposed that' it presses the varm 2e downwardly against the pressure on the diaphragm. As shown the arm 2e is at its lowest position, indicating that the pressure in the storage tank has tall-en and that power is required to operate the pump to restore the pressure to maximum. The ree end ot the arm Qfl is connected by' a link 27 to an arm QS ot' the throttle 'valve in such manner that when the weight carries the arm downwardly the throttle `valve' is opened, and when the arm is raised by the diaphragm the throttle valve 'is closed. This mechanism and operation is allwell known', and l do not make any claim for it per se. l

The auxiliary A conventionally at 30.. -The motor s carries a driving pinion 32 Whose teeth mesh with the teeth of large gear 33.

the power of `the steam engine alone, or by the power of the electric motor alone, or by the combined power of the steam engine and electric motor.

The purpose for which the pump is operated is immaterial,l although the` combination is designed primarily lor a hydraulic pump tor elevator serviceu The advantages ot. the combination are hereinafter pointed out.-

The accompanying drawing, which illustrates one arrangement in which the elel ments may be combined, represents a pump, a steam engine tor driving the same, an auxiliary electric motor also connected to the pump to drive the same, and automatic means for controlling the steam engine and the electric motor.

The same reference characters indicate the same parts wherever they occur.

I The drawing is somewhatconve tional, for the purpose ot avoiding electric LAmotor is indicated unnecessary hatt 31 drawing, but certain features will be readily understood by persons familiar with'puinping apparatus, wit-hout having `them all This gear is atiixed to a shaft 3e which is illustrated in detail. mounted in suitable bearings upon a base A pump is' indicated at 10, anc'. the cylin- 35. A crank disk 36 is aiXed to the shaft 34 and thus compounded with the gear The/crank pin 37 carried by the'crank disk is connected by a connecting rod 38 with der thereof at 11. `The pump 'piston is indicated at 12, and the piston rod is indicated rarentecaug; 2o, `isis..

The weight is indicated by the drawing' piston is indiot course, a great explain their operation f The regu- 23 ot the ice l alone, althon atmosphere Vand the apparatus being petcocks 4G. It it the piston rod 13 which, as shown, extends through both heads A pivot stud 39 isnsed t'o connect the rod 3S with asliding crosshead 40 at the right-hand end of the piston rod. Suitable stuiling boxes are, of course, provided for preventing the escape ofsteam from the cylinder 16 around the bearings of the piston rod. The regulator 21 which is providedA for controlling the steam engineis used also for controlling` the electric motor, the control* of the electric motor being accomplished through the operating arm ft2 is connecte with the weighted arm 24.

A switch is indicated conventionally for forming the desiredconnection with the electric feed wires which are coimected. to the rheostat. Electric conductors 45 connect the motorl 30 with the rheostat. The connection between the'rheostat and the niotoris such that when the controller -il- Q is in the posit-ion shown ,the full current ofelect'rieit-y is supplied Ato themotomhut when 'the' controller is raised as tar asthef regulator can raise it, electrical.connection`v is broken.

The drawing is intended'to re driven by the el gh the throttle 20 is assumed that there is' in the present instance reason it is immaterial whether the valve 20 Vis open or closed. vThe petcocks 46at ,the bottom of the steamcylinder are open, thus affording open communicationbetween the' interior of the steam cylinder to vent the cylinder and avoid any resistance due to pressure or vacuum caused by movement of the piston 17. So long as the pressure in the storage tank is below maximum. the rheostat maintains electric connection for driving the electric motor; but when the maximum pressure has been attained. the regulator Will move the controller 42 and disconnect the electric motor so that the pump Will stop. lf there is a supply of steam available, the steam engine and electric motor may be utilized at the same time if it .isdesired to drive the pump at. high speed. In such case the only change of parts necessary to accomplish the desired result is to close thc should be desired to opby means ot' the steam engine alone, the source of electrical power may be disconnected by opening the switch 44 or by disconneeting the link 43 from either the controller 42 or from the arm 24, leaving the controller in its upper position. Thei'nechanical connection betwe-en't-he piston rod 13and the crank 3T should likewise be broken. This may be done by removing the connecting stud 3 9 from the crosshead d by a link present'v the ect'ric 'motor v is open. It no supply of steam-4 and that for that.

erate tho pum p of the 'steam cylinderl l I medium ot' a rheostat 41 whose,i tively high 43 j the elevator at-'fhigl be moved toward tl ate-t? On some `occasion stat 41, vthe regul electric 'as when it 1s oper operated b 'usual manner.

discontinue' the lelevator may be operated more eco using the. 'electric 'motor alone,

a0 .and'by swinging the connecting rod A38 out. of the. path of the crosshead. y

VVheu the two motors are combined and controlled in the manner explained, the pump may be Aoperated with great economy, according to-various conditions. For example. if the pump is used for operating an elevator, the combincd'power of: the two motors -will operate the elevator at high speed. The maximum pressure which kthe pump will develop is, of course, determined by the position ot'vthc weight 2G on thc arm 24. Thus., if it is desired to have a relapressure available for operating 1 speed7 theweight will ie free ond of the arm 21; sfor example,v on Sundays or holidays, or at night-it may be desirable to operate the` elevator at slow, speed, for the sake of economy. lf at such times. thereis a suilicient sul'iply of steam the electric motor 'may be disconnected, the weightQG fmay V be moved tonardthe fnlcrurn 'of thearm 24, and thepumpniay be cngine'alone in the l yythe'steam A',tyfertain :times it may be desirable to supply of steam, At night,

4for example, lor on Sundays or hol 4 nomically in which case the servicesv of` a firemanA and engineer are not necessary to keep up vthe supply of steamv and attend to. the steam engine. No attendant is-necefssary for the electric motor, and it maybe assumed that-the .current therefor is` supplied, in theprcsentinstance, by lpublicfser'vice.V It i's toloe noted that the pump may be operated by either of the motors alone or by both motors combined, without disturbing` theconnection between the regulator and the throttle 2O and rheoator 21 `thus serving to ,control .the supplyof steam and the supplyr of electricity singly or in combination.

Ithas been pointed out that all the me`. chanical 'connections of the transmitting mechanism may remain connected when the motor is operating alone, as well ating in conjunction with the steam engine. The only condition under which it is-neeessary ,to interrupt such me ychanical connection-'is when the steam en' rod 38 from 'steam engine `for idays, the i operating` the pump, op-

tor is driven, a regulator influenced by the pressure developed by the pump, and connections between said regulator andV said valve and controller whereby the motive forces for said engine and .motor are automatically turned onand oi. v

' 2. The combination with a pump, of a steam engine' for operating tbe same, an electric motor forv operating the pump, operating connections between the pump an said engine and motor, a regulator iniu-- enced by the pressure developed by said pump, means actuated by said regulator for turning on andff the supply of steam for said engine, and means actuated -by said regulator for turning on and ofi' the current for said motor.

-3. The combinat1on with a pump having va-reciprocat'ory piston and pistongrcd, a

steam engineA operatively connected with said piston rod to drive the same, an electric motor, disconnectible means for transmitting motion from saidnmotor to said piston rod, a regulator influenced by the pressure developed by said pump, means adapted to be actuated by said regulator for turning on and off the supply of steam for said engine, and means adapted to `.be .actuated by said regulator for turning on and oit' the current for drivin said motor.

. 4:. The combination witgh a cylinder, piston, and piston rod, of a steam engine having a steam cylinder and piston, said steam piston being operatively connected with said piston rod, an electric motor, a crank connected to said motor to be driven thereby, a' connectin rod one end d of which is engaged with sind crankJ disconnectible means for connecting the other end of said connecting rod with said piston rod, a revulator influenced by the pressure developedj by said pump, means adapted to be actuated by said i on and off the supply 'of steam for said steam engine, means adapted to be actuated by said regulator for turning on and 0E the current for said motor,and means for opening and closing communication between said steam cylinder and the atmosphere.

In testimony whereof I- have affixed my signature, in presence of two Witnesses.

' WILLIAM '11j PIERCE.

Witnesses a pump having' regulator for turning-y 

